I bought the Tata Nano in the year 2012, its a pretty decent car for a family with low income level.Its a very budget friendly and economical car.
But the built quality and the engine power is not at all good.It has nice and good full efficiency but this car is not for family purpose. Only 3 person can sit comfortably in this car, if you have family of 4 then don't go for tata nano.
This car is not suitable for long term use